S
M
T
W
T
F
S
27
89°
74°
28
89°
70°
29
85°
76°
30
82°
76°
1
83°
74°
2
89°
82°
3
88°
74°
4
89°
76°
5
90°
79°
6
90°
77°
7
92°
78°
8
91°
77°
9
91°
80°
10
91°
79°
11
91°
78°
12
91°
79°
13
88°
78°
14
88°
77°
15
90°
80°
16
89°
79°
17
90°
76°
18
85°
75°
19
86°
78°
20
85°
73°
21
85°
68°
22
83°
72°
23
82°
72°
24
80°
74°
25
83°
76°
26
81°
75°
27
83°
74°
28
84°
76°
29
83°
75°
30
83°
77°
31
80°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Key Largo
Key Largo's October 2026 forecast shows daily high temperatures ranging from 80° to 84°, with overnight lows between 72° and 77°. The average high for October is 82° with an average low of 74°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Key Largo. See also: November | December | January.
